Well, I tried to figure this out, but then realized I should just ask the experts... you all! Here's what I have: 3 64MB PC100 DIMM's. I want to stick them in my B&W... I got them from my boss who yanked them from slot-load iMacs which he upgraded with 256MB DIMMS a couple years ago. I figured the sticks have been sitting around long enough and I should try and put them to use. Here's my question-- Two of them look identical... One of them looks shorter. They are all the same length and have the same look, but, well, one is just shorter. I don't know what else to say. They are all Samsung made. The short one has a sticker on it that says "64MB Sync, 100MHz, CL3." One of the longer DIMMS has a sticker on it that says "PC100-322-620." Is it safe to assume they will all work? Can I just stick one in at a time and see if something goes wrong? Should I forget about the short one? Thanks all!